The older you get, the wiser you get ... hopefully. I have always loved to hike, but rarely did I go prepared. Who needs water? What are the chances I will come across a bear? How about a first aid kit? I have changed (mostly) in my old age and now bring necessities, as well as potentialities along for the walk. Camelbak's new packs fit comfortably (dual straps), are lightweight, and allow you to carry water and other essential items. When we were hiking in the Grand Tetons, I needed lots of water, bear spray (which yikes I did not have), suntan lotion, food, a radio, and more. The key is to have your own bag pre-loaded with these items (though you can't fly with bear spray), so when you arrive at your destination, you can embark on your hike fully prepared.